Starship Asterisk*

VictorBorun wrote: ↑Wed Sep 07, 2022 6:14 pm Those stars are, however, inside a thick dust nebula; they may all be already born, may already have broken their tight dust cocons.
So the star of the perinatal story is a first

VictorBorun wrote: ↑Wed Sep 07, 2022 4:56 pm I am confused with this:
The signature of atomic hydrogen, shown in blue, shows up in the star itself but not immediately surrounding it. Instead, it appears outside the “bubble,” which spectra show is actually “filled” with molecular hydrogen (green) and complex hydrocarbons (red). This indicates that the bubble is actually the top of a dense pillar of dust and gas that is being blasted by radiation from the cluster of massive young stars to its lower right (see the full NIRCam image). It does not appear as pillar-like as some other structures in the nebula because there is not much color contrast with the area surrounding it.

Where is that pillar?

AVAO wrote: ↑Wed Sep 07, 2022 4:41 pm And as far as i can see, there are plenty of star births to be found in the he prominent dark dust lane of Ann too.
Jac

Click to view full size image 1 or image 2

jac berne (flickr) Image 1: subtraction JWST/HST Image 2: HST

VictorBorun wrote: ↑Wed Sep 07, 2022 2:56 pm Hubble over NIRCam

Click to view full size image 1 or image 2

Hubble over MIRI

Click to view full size image 1 or image 2

Webb site says their near IR spectrum shows the protostar bubble as a top of a pillar, not yet blown from inside by the newborn star, but blown from outside by the forming globular stellar cluster

My frame is cut here:
R136 cut.jpg

APOD Robot wrote: ↑Wed Sep 07, 2022 4:05 am Since R136's brightest stars emit more of their light in the near infrared, they are much more prominent on that image.

VictorBorun wrote: ↑Wed Sep 07, 2022 9:03 am

Ann wrote: ↑Wed Sep 07, 2022 4:51 am Note the brilliant yellow star in the NIRCam image. The same star is visible at center left in the MIRI image. What kind of star is that?
Well, look at the first Hubble image I posted, There is an orange star in that position. It is the only orange star among all the blue stars in the Hubble image. I have always thought of this orange star as the only red giant in (or near) R136 in the Tarantula Nebula.
It sure shines in infrared.

I tried to locate it in simbad at
05 38 48.56 -69 05 31.49
and got this:
W61 7-8 -- Red Supergiant

Now I wonder what to make of wiki's statement:
R136 is thought to be less than 2 million years old.[8][9] None of the member stars is significantly evolved and none is thought to have exploded as supernova. The brightest stars are WNh, O supergiants, and OIf/WN slash stars, all extremely massive fully convective stars. There are no red supergiants, blue hypergiants, or luminous blue variables within the cluster.

Ann wrote: ↑Wed Sep 07, 2022 4:51 am Note in the Hubble image a dark dust lane just above the R136 cluster itself. The dust lane is "folded over on itself". It is more obvious here:
In the MIRI image, the prominent dark dust lane is seen to be apparently connected to a larger cloud of gas and dust to its upper left (presumably to its north west).

Ann wrote: ↑Wed Sep 07, 2022 4:51 am Note the brilliant yellow star in the NIRCam image. The same star is visible at center left in the MIRI image. What kind of star is that?
Well, look at the first Hubble image I posted, There is an orange star in that position. It is the only orange star among all the blue stars in the Hubble image. I have always thought of this orange star as the only red giant in (or near) R136 in the Tarantula Nebula.
It sure shines in infrared.